Chapter 4 - The bpf() System Call

In this chapter I'll walk you through the system calls invoked by these example programs hello-buffer-config.py and hello-ring-buffer-config.py.

Exercises

Example solution to using bpftool to update the config map:

bpftool map update name config key 0x2 0 0 0 value hex 48 65 6c 6c 6f 20 32 0 0 0 0 0